The correct answer is A. Determination of objectives.
The determination of objectives is the most fundamental of the guidance activities because it provides the foundation for all other activities. The objectives must be clear, specific, and measurable in order to be effective. Once the objectives are determined, the other guidance activities can be implemented in a way that is aligned with those objectives.
B. Selection of learning activities is important, but it cannot be done without first determining the objectives. The learning activities must be selected in a way that is consistent with the objectives.
C. Determination of learning process is also important, but it cannot be done without first determining the objectives. The learning process must be designed in a way that is consistent with the objectives.
D. Selection of curriculum is important, but it cannot be done without first determining the objectives. The curriculum must be selected in a way that is consistent with the objectives.
In conclusion, the determination of objectives is the most fundamental of the guidance activities because it provides the foundation for all other activities.